Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.
What is claimed is:
1. A method of treating an alloy surface comprising the step of contacting the
alloy surface with a
treatment fluid comprising an aqueous acidic fluid and a corrosion inhibitor
wherein the corrosion
inhibitor inhibits or reduces corrosion of the alloy surface and further
wherein the corrosion inhibitor
consists essentially of a propargylalcohol alkoxylated compound and a
corrosion inhibitor intensifier.
2. The method of claim 1, wherein the propargylalcohol alkoxylated compound
comprises prop-2-
yn-1-ol alkoxylated, ethyleneglycolpropargylether, or combinations thereof.
3. The method of either claim 1 or 2, wherein the alloy surface comprises
alloys of steel, alloys of
nickel, coiled tubing, corrosion resistant alloys, or duplex steels.
4. The method of any one of claims 1 to 3, wherein the alloy surface is used
in an application
comprising pickling a tubular, cleaning a wellbore, matrix acid stimulation,
acid fracturing, acid
tunneling, drilling mud removal, scale treatment, coiled tubing application,
or damage removal.
5. The method of any one of claims 1 to 4, wherein the aqueous acidic fluid
comprises hydrochloric
acid, hydrochloric-hydrofluoric acid, acetic acid, formic acid, citric acid,
phosphonic acid,
methanesulfonic acid, or combinations thereof.
6. The method of any one of claims 1 to 5, wherein the propargylalcohol
alkoxylated compound is
present in a range of 0.1 vol. % to 5.0 vol. %.
7. The method of any one of claims 1 to 6, wherein the corrosion inhibitor
reduces corrosion rates
of the alloy surface to less than 0.050 lb/ft2 during the step of contacting
the alloy surface with the
treatment fluid.
8. The method of any one of claims 1 to 7, wherein the corrosion inhibitor
intensifier is selected
from the group consisting of formic acid, sodium formate, potassium formate,
methylformate,
ethylformate, sodium iodide, potassium iodide, copper iodide, molecular
iodide, metal oxides, and
combinations thereof.
9. The method of any one of claims 1 to 8, wherein the corrosion inhibitor
intensifier is present in a
range of 2 pptg to 100 pptg.
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10. The method of any one of claims 1 to 9, wherein the corrosion inhibitor
and corrosion inhibitor
intensifier reduce corrosion rates of the alloy surface to less than 0.050
lb/ft2 during the step of
contacting the alloy surface with the treatment fluid at temperatures of up to
350 °.
11. The method of any one of claims 1 to 7, wherein the corrosion inhibitor
intensifier is liquid and
is present in a range of 1 gpt to 50 gpt.
12. A method of inhibiting or reducing corrosion of a steel surface in contact
with an acidic fluid
comprising the steps of:
(a) contacting the acidic fluid with a corrosion inhibitor consisting
essentially of a
propargylalcohol alkoxylated compound and a corrosion inhibitor intensifier;
(b) contacting the steel surface with the acidic fluid and corrosion
inhibitor; and
(c) inhibiting or reducing corrosion of the steel surface by contacting the
steel with the
corrosion inhibitor.
13. The method of claim 12, wherein the proparygylalcohol alkoxylated compound
is of the formula
R-C.ident.C-C(R1)(R2)-O-[C(R3)-C-O]n H
wherein R, R1, R2, and R3 have from 0 to 8 carbon atoms and n ranges from 1 to
15.
14. The method of claims 12 or 13, wherein the steel surface comprises alloys
of steel, alloys of
nickel, coiled tubing, corrosion resistant alloys, or duplex steels.
15. The method of any one of claims 12 to 14, wherein the step of contacting
the steel surface with
the acidic fluid and the corrosion inhibitor comprises pickling a tubular,
cleaning a wellbore, matrix acid
stimulation, acid fracturing, acid tunneling, drilling mud removal, scale
treatment, coiled tubing
application, or damage removal.
16. The method of any one of claims 12 to 15, wherein the acidic fluid
comprises hydrochloric acid,
hydrochloric-hydrofluoric acid, acetic acid, formic acid, citric acid,
phosphonic acid, methanesulfonic
acid, and combinations thereof.
17. The method of any one of claims 12 to 16, wherein the corrosion inhibitor
reduces corrosion
rates of the steel surface to less than 0.050 lb/ft2 during the step of
contacting the steel surface with the
acidic fluid.
18. The method of any one of claims 12 to 17, wherein the corrosion inhibitor
intensifier is selected
from the group consisting of formic acid, sodium formate, potassium formate,
methylformate,
ethylformate, sodium iodide, potassium iodide, copper iodide, molecular
iodide, metal oxides, and
combinations thereof.
19. The method of any one of claims 12 to 18, wherein the corrosion inhibitor
intensifier is present
in a range of 2 pptg to 100 pptg.
20. The method of any one of claims 12 to 19, wherein the corrosion inhibitor
and corrosion
inhibitor intensifier reduce corrosion rates of the alloy surface to less than
0.050 lb/ft2 during the step of
contacting the steel surface with the acidic fluid at temperatures of up to
350 °F.
21. The method of any one of claims 12 to 17, wherein the corrosion inhibitor
intensifier is liquid
and is present in a range of 1 gpt to 50 gpt.
22. A method of treating an alloy surface comprising the step of contacting
the alloy surface with a
treatment fluid comprising an aqueous acidic fluid and a corrosion inhibitor
comprising a
propargylalcohol alkoxylated compound and a corrosion inhibitor intensifier so
that a reduction in
corrosion of the alloy surface occurs compared with only contacting the alloy
surface with the aqueous
acidic fluid, wherein the corrosion inhibitor intensifier is liquid and is
present in a range of 1 gpt to 50
gpt.
23. The method of claim 22, wherein the propargylalcohol alkoxylated compound
comprises prop-2-
yn-1-ol alkoxylated, ethyleneglycolpropargylether, or combinations thereof.
24. The method of claim 22 or 23, wherein the alloy surface comprises alloys
of steel, alloys of
nickel, coiled tubing, corrosion resistant alloys, or duplex steels.
25. The method of any one of claims 22 to 24, wherein the alloy surface is
used in an application
comprising pickling a tubular, cleaning a wellbore, matrix acid stimulation,
acid fracturing, acid
tunneling, drilling mud removal, scale treatment, coiled tubing application,
or damage removal.
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26. The method of any one of claims 22 to 25, wherein the aqueous acidic fluid
comprises
hydrochloric acid, hydrochloric-hydrofluoric acid, acetic acid, formic acid,
citric acid, phosphonic acid,
methanesulfonic acid, or combinations thereof.
27. The method of any one of claims 22 to 26, wherein the corrosion inhibitor
is present in a range
of 0.1 vol. % to 5.0 vol. %.
28. the method of any one of claims 22 to 27, wherein the corrosion inhibitor
reduces corrosion
rates of the alloy surface to less than 0.050 lb/ft2 during the step of
contacting the alloy surface with the
treatment fluid.
29. The method of any one of claims 22 to 28, wherein the corrosion inhibitor
intensifier is selected
from the group consisting of formic acid, sodium formate, potassium formate,
methylformate,
ethylformate, sodium iodide, potassium iodide, copper iodide, molecular
iodide, metal oxides, and
combinations thereof.
30. The method of any one of claims 22 to 29, wherein the corrosion inhibitor
intensifier is present
in a range of 5 pptg to 30 pptg.
31. The method of any one of claims 22 to 30, wherein the corrosion inhibitor
and corrosion
inhibitor intensifier reduce corrosion rates of the alloy surface to less than
0.050 lb/ft2 during the step of
contacting the alloy surface with the treatment fluid at temperatures of up to
350 °F.
32. A method of inhibiting corrosion of a steel surface in contact with an
acidic fluid comprising the
steps of:
a. contacting the acidic fluid with a corrosion inhibitor and a corrosion
inhibitor intensifier,
wherein the corrosion inhibitor is a compound having a formula
R-C.ident.C-C( R1)(R2)-O-[C(R3)-C-O]n H
wherein R, R1, R2, and R3 have from 0 to 8 carbon atoms and n ranges from 1 to
15, and
wherein the corrosion inhibitor intensifier is liquid and is selected from the
group consisting
of formic acid, sodium formate, potassium formate, methylformate,
ethylformate, sodium
iodide, potassium iodide, copper iodide, molecular iodide, metal oxides, or
combinations
thereof and wherein the corrosion inhibitor intensifier is present in a range
of 1 gpt to 50
gpt;
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b. contacting the steel surface with the acidic fluid and the corrosion
inhibitor.
33. The method of claim 32, wherein the compound is selected from the group
consisting of prop-2-
yn-1-ol alkoxylated, ethyleneglycolpropargylether, or combinations thereof and
is present in a range of
0.1 vol. % to 5.0 vol. %.
34. The method of either claim 32 or 33, wherein the steel surface comprises
alloys of steel, alloys
of nickel, coiled tubing, corrosion resistant alloys, or duplex steels.
35. The method of any one of claims 32 to 34, wherein the step of contacting
the steel surface with
the acidic fluid and the corrosion inhibitor comprises pickling a tubular,
cleaning a wellbore, matrix acid
stimulation, acid fracturing, acid tunneling, drilling mud removal, scale
treatment, coiled tubing
application, or damage removal.
36. The method of any one of claims 32 to 35, wherein the acidic fluid
comprises hydrochloric acid,
hydrochloric-hydrofluoric acid, acetic acid, formic acid, citric acid,
phosphonic acid, methanesulfonic
acid, and combinations thereof.
37. The method of any one of claims 32 to 36, wherein the corrosion inhibitor
reduces corrosion
rates of the steel surface to less than 0.050 lb/ft2 during the step of
contacting the steel surface with the
acidic fluid.
38. The method of any one of claims 32 to 37, wherein the corrosion inhibitor
intensifier is present
in a range of 5 pptg to 30 pptg.
39. The method of any one of claims 32 to 38, wherein the corrosion inhibitor
and corrosion
inhibitor intensifier reduce corrosion rates of the alloy surface to less than
0.050 lb /ft2 during the step of
contacting the steel surface with the acidic fluid at temperatures of up to
350 °F.
40. A composition for use in the acid treatment of wells, consisting
essentially of:
a corrosion inhibitor comprising a propargylalcohol alkoxylated compound and a
corrosion
inhibitor intensifier in an acidic solution.
41. The composition of claim 40, wherein the propargylalcohol alkoxylated
compound comprises
prop-2-yn-l-ol alkoxylated, ethyleneglycolpropargylether, or combinations
thereof; and the corrosion
inhibitor intensifier comprises formic acid, sodium formate, potassium
formate, methylformate,
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ethylformate, sodium iodide, potassium iodide, copper iodide, molecular
iodide, metal oxides, or
combinations thereof; and the acidic solution comprises hydrochloric acid,
hydrochloric-hydrofluoric
acid, acetic acid, formic acid, citric acid, phosphonic acid, methanesulfonic
acid, and combinations
thereof.
42. A method of acid treating subterranean formations comprising the step of
contacting a
subterranean formation with a treatment fluid comprising an aqueous acidic
fluid, a corrosion inhibitor
comprising a propargylalcohol alkoxylated compound, and a corrosion inhibitor
intensifier comprising
formic acid, sodium formate, potassium formate, methylformate, ethylformate,
sodium iodide,
potassium iodide, copper iodide, molecular iodide, metal oxides, or
combinations thereof, wherein the
corrosion inhibitor intensifier is liquid and is present in a range of 1 gpt
to 50 gpt.
43. The method of claim 42, wherein the propargylalcohol alkoxylated compound
comprises prop-2-
yn-1-ol alkoxylated, ethyleneglycolpropargylether, or combinations thereof.
44. The method of either claim 42 or 43, further comprising the step of
treating an alloy surface
within the subterranean formation with the treatment fluid prior to the
treatment fluid being contacted
with the subterranean formation, wherein the alloy surface comprises alloys of
steel, alloys of nickel,
coiled tubing, corrosion resistant alloys, or duplex steels.
45. The method of any one of claims 42 to 44, wherein the acid treating is an
application comprising
matrix acid stimulation, acid fracturing, acid tunneling, drilling mud
removal, scale treatment, coiled
tubing application, or damage removal.
46. The method of any one of claims 42 to 45, wherein the aqueous acidic fluid
comprises
hydrochloric acid, hydrochloric-hydrofluoric acid, acetic acid, formic acid,
citric acid, phosphonic acid,
methanesulfonic acid, or combinations thereof.
47. The method of any one of claims 42 to 46, wherein the corrosion inhibitor
is present in a range
of 0.1 vol. % to 5.0 vol. % and the corrosion inhibitor reduces corrosion
rates of the alloy surface to less
than 0.050 lb/ft2 during the step of contacting the alloy surface with the
treatment fluid.
48. The method of claim any one of claims 42 to 46, wherein the corrosion
inhibitor intensifier is
present in a range of 5 pptg to 30 pptg and the corrosion inhibitor and
corrosion inhibitor intensifier
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reduce corrosion rates of the alloy surface to less than 0.050 lb/ft2 during
the step of contacting the
alloy surface with the treatment fluid at temperatures of up to 350 °F.
49. A method of acid treating a subterranean formation with an acidic fluid,
comprising the steps of:
(a) contacting the acidic fluid with a corrosion inhibitor comprising a
compound having a
formula
R-C.ident.C-C(R1)(R2)-O-[C(R3)-C-O]n H
wherein R, R1, R2, and R3 have from 0 to 8 carbon atoms and n ranges from 1 to
15;
(b) contacting the acidic fluid with a corrosion inhibitor intensifier
comprising formic acid,
sodium formate, potassium formate, methylformate, ethylformate, sodium iodide,
potassium
iodide, copper iodide, molecular iodide, metal oxides, or combinations
thereof; and
(c) pumping the acidic fluid, the corrosion inhibitor, and the corrosion
inhibitor intensifier
into the subterranean formation so that the acidic fluid, the corrosion
inhibitor, and the
corrosion inhibitor intensifier contact the subterranean formation
wherein the corrosion inhibitor intensifier is liquid and is present in a
range of 1 gpt to 50 gpt.
50. The method of claim 49, wherein the corrosion inhibitor is a
propargylalcohol alkoxylated
compound comprising prop-2-yn-1-ol alkoxylated, ethyleneglycolpropargylether,
or combinations
thereof.
51. The method of claim 49 or 50, wherein the corrosion inhibitor is present
in a range of 0.1 vol. %
to 5.0 vol. %.
52. The method of any one of claims 49 to 51, further comprising contacting
the acidic fluid and the
corrosion inhibitor with a steel surface to reduce corrosion on the steel
surface prior to the acidic fluid
and the corrosion inhibitor being pumped into the subterranean formation,
wherein the steel surface
comprises alloys of steel, alloys of nickel, coiled tubing, corrosion
resistant alloys, or duplex steels.
53. The method of any one of claims 49 to 52, wherein the step of acid
treating the subterranean
formation comprises matrix acid stimulation, acid fracturing, acid tunneling,
drilling mud removal, scale
treatment, coiled tubing application, or damage removal.
54. The method of any one of claims 49 to 53, wherein the corrosion inhibitor
reduces corrosion
rates of the steel surface to less than 0.050 lb/ft2 during the step of
contacting the steel surface with the
acidic fluid.
55. The method of any one of claims 49 to 54, wherein the corrosion inhibitor
intensifier is present
in .a range of 2 pptg to 100 pptg.
56. The method of any one of claims 49 to 55, wherein the corrosion inhibitor
and corrosion
inhibitor intensifier reduce corrosion rates of the alloy surface to less than
0.050 lb/ft2 during the step of
contacting the steel surface with the acidic fluid at temperatures of up to
350 °F.
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